Which of the following statements are true ? I. A circuit that adds two bits, producing a sum bit and a carry bit is called half adder. II. A circuit that adds two bits, producing a sum bit and a carry bit is called full adder. III. A circuit that adds two bits and a carry bit producing a sum bit and a carry bit is called full adder. IV. A device that accepts the value of a Boolean variable as input and produces its complement is called an inverter. (A) I & II (B) II & III (C) I, II, III (D) I, III & IV

Which of the following statements are true ? I. A circuit that adds two bits, producing a sum bit and a carry bit is called half adder. II. A circuit that adds two bits, producing a sum bit and a carry bit is called full adder. III. A circuit that adds two bits and a carry bit producing a sum bit and a carry bit is called full adder. IV. A device that accepts the value of a Boolean variable as input and produces its complement is called an inverter. (A) I & II (B) II & III (C) I, II, III (D) I, III & IV
by

1 Answer

Answer :

(D) I, III & IV
by

Related questions

The size of the ROM required to build an 8-bit adder/subtractor with mode control, carry input, carry output and two’s complement overflow output is given as

Description : The size of the ROM required to build an 8-bit adder/subtractor with mode control, carry input, carry output and two’s complement overflow output is given as

Last Answer : (B) 218 × 10

A full adder is a combinational circuit that performs the arithmetic sum of three input bits and produces a

Description : A full adder is a combinational circuit that performs the arithmetic sum of three input bits and produces a (a) sum output (b) sum output and a carry (c) sum output with two carries (d) two sums with two carries

Last Answer : A full adder us an a combination logical circuit which will produces an sum and carry when ever more than two inputs were given.

Consider a full-adder with the following input values: (a) x=1, y=0 and Ci(carry input) = 0 (b) x=0, y=1 and Ci = 1 Compute the values of S(sum) and C0 (carry output) for the above input values. (A) S=1 , C0= 0 and S=0 , C0= 1 (B) S=0 , C0= 0 and S=1 , C0= 1 (C) S=1 , C0= 1 and S=0 , C0= 0 (D) S=0 , C0= 1 and S=1 , C0= 0

Description : Consider a full-adder with the following input values: (a) x=1, y=0 and Ci(carry input) = 0 (b) x=0, y=1 and Ci = 1 Compute the values of S(sum) and C0 (carry output) for the above input values. (A) S=1 , C0= 0 and ... C0= 1 (C) S=1 , C0= 1 and S=0 , C0= 0 (D) S=0 , C0= 1 and S=1 , C0= 0

Last Answer : (A) S=1 , C0= 0 and S=0 , C0= 1

The Excess-3 decimal code is a self-complementing code because (A) The binary sum of a code and its 9’s complement is equal to 9. (B) It is a weighted code. (C) Complement can be generated by inverting each bit pattern. (D) The binary sum of a code and its 10’s complement is equal to 9.

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Last Answer : Answer: A, C

Beam-penetration and shadow-mask are the two basic techniques for producing color displays with a CRT. Which of the following is not true ? I. The beam-penetration is used with random scan monitors. II. Shadow-mask is used in raster scan systems. III. Beam-penetration method is better than shadow-mask method. IV. Shadow-mask method is better than beam-penetration method. (A) I and II (B) II and III (C) III only (D) IV only

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Last Answer : (C) III only

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Last Answer : C) i-false, ii-true, iii-false, iv-false

The BCD adder to add two decimal digits needs minimum of (A) 6 full adders and 2 half adders (B) 5 full adders and 3 half adders (C) 4 full adders and 3 half adders (D) 5 full adders and 2 half adders

Description : The BCD adder to add two decimal digits needs minimum of (A) 6 full adders and 2 half adders (B) 5 full adders and 3 half adders (C) 4 full adders and 3 half adders (D) 5 full adders and 2 half adders

Last Answer : (D) 5 full adders and 2 half adders

Which of the following is a sequential circuit? (A) Multiplexer (B) Decoder (C) Counter (D) Full adder

Description : Which of the following is a sequential circuit? (A) Multiplexer (B) Decoder (C) Counter (D) Full adder

Last Answer : (C) Counter

Which of the following are the functions of operating system? i) recovering from errors ii) facilitating input/output iii) facilitating parallel operation iv) sharing hardware among users v) implementing user interface A) i, ii, ii, and v only B) i, ii, iii, and iv only C) ii, iii, iv and v only D) All i, ii, iii, iv and v

Description : Which of the following are the functions of operating system? i) recovering from errors ii) facilitating input/output iii) facilitating parallel operation iv) sharing hardware among users v) implementing user interface A) i, ii, ... only C) ii, iii, iv and v only D) All i, ii, iii, iv and v

Last Answer : D) All i, ii, iii, iv and v

The fast carry or look-ahead carry circuits found in most 4-bit parallel-adder circuits:

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Last Answer : The fast carry or look-ahead carry circuits found in most 4-bit parallel-adder circuits: Reduce propagation delay.

Java Servlet i) is key component of server side java development ii) is a small pluggable extension to a server that enhances functionality iii) runs only in Windows Operating System iv) allows developers to customize any java enabled server A) i, ii & iii are ture B) i, iii & iv are true C) ii, iii & iv are true D) i, ii & iv are true

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Last Answer : D) i, ii & iv are true

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Last Answer : (D) III only

An analog signal carries 4 bits in each signal unit. If 1000 signal units are sent per second, then baud rate and bit rate of the signal are ............... and .............. (A) 4000 bauds \ sec & 1000 bps (B) 2000 bauds \ sec & 1000 bps (C) 1000 bauds \ sec & 500 bps (D) 1000 bauds \ sec & 4000 bps

Description : An analog signal carries 4 bits in each signal unit. If 1000 signal units are sent per second, then baud rate and bit rate of the signal are ............... and .............. (A) 4000 bauds \ sec & ... (B) 2000 bauds \ sec & 1000 bps (C) 1000 bauds \ sec & 500 bps (D) 1000 bauds \ sec & 4000 bps

Last Answer : (D) 1000 bauds \ sec & 4000 bps Explanation: Bit rate is the number of bits per second. Baud rate is the number of signal units per second. Baud rate is less than or equal to the bit rate. Baud rate = 1000 bauds per second (baud/s) Bit rate = 1000 x 4 = 4000 bps

What can you say about the following statements? I. XML tags are case-insensitive. II. In JavaScript, identifier names are case-sensitive. III. Cascading Style Sheets (CSS) cannot be used with XML. IV. All well-formed XML documents must contain a document type definition. (1) only I and II are false. (2) only III and IV are false. (3) only I and III are false. (4) only II and IV are false.

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Last Answer : Answer: Marks to all

A Boolean operator Ө is defined as follows: 1Ө1=1, 1Ө0=0, 0Ө1=0 and 0Ө0=1 What will be the truth value of the expression (xӨy)Өz = xӨ(yӨz)? (A) Always false (B) Always true (C) Sometimes true (D) True when x, y, z are all true

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Last Answer : (B) Always true

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Description : Which of the following is true about the static member variable in C++. i) It is initialized to zero when the first object of its class is created. Other initialization is also permitted. ii) It is visible only within ... , ii-True B) ii-False, ii-True C) i-True, ii-False D) i-False, iii-False

Last Answer : B) ii-False, ii-True

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Last Answer : B) i-True, ii-True

Consider the following statements : (a) Boolean expressions and logic networks correspond to labelled acyclic digraphs. (b) Optimal Boolean expressions may not correspond to simplest networks. (c) Choosing essential blocks first in a Karnaugh map and then greedily choosing the largest remaining blocks to cover may not give an optimal expression. Which of these statement(s) is/ are correct? (A) (a) only (B) (b) only (C) (a) and (b) (D) (a), (b) and (c)

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Last Answer : (D) (a), (b) and (c) 

What type of adder is used to handle a carry from a previous circuit?

Description : What type of adder is used to handle a carry from a previous circuit?

Last Answer : Full adder.

break statement is used to i) get out of method ii) end aprogram iii) get out of a loop iv) get out of the system A) 1 & 2 B) 1,2 & 3 C) 1 & 3 D) 3

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Last Answer : D) 3

OOP features are i) Increasing productivity ii) Reusability iii) Decreasing maintenance cost iv) High vulnerability A) 1,2 & 4 B) 1,2 & 3

Description : OOP features are i) Increasing productivity ii) Reusability iii) Decreasing maintenance cost iv) High vulnerability A) 1,2 & 4 B) 1,2 & 3

Last Answer : B) 1,2 & 3

An ER Model includes I. An ER diagram portraying entity types. II. Attributes for each entity type III. Relationships among entity types. IV. Semantic integrity constraints that reflects the business rules about data not captured in the ER diagram. (A) I, II, III & IV (B) I&IV (C) I, II & IV (D) I & III

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Last Answer : (A) I, II, III & IV

Circuit A is a 1-bit adder; circuit B is a 1 bit multiplier. a. Circuit A has more gates than circuit B b. Circuit B has more gates than circuit A c. Circuit A has the same number of gates as circuit B

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State true or false. i) init() is called after start() in applet ii) applets are used for networking iii) inheritance is a part of Java Foundation Classes iv) final does not prevent inheritance A) i-true, ii-true, iii-false, iv-true B) i-false, ii-false, iii-false, iv-false C) i-true, ii-true, iii-true, iv-true D) i-true, ii-false, iii-false, iv-false

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Last Answer : B) i-false, ii-false, iii-false, iv-false

Consider the following justifications for commonly using the two-level CPU scheduling : I. It is used when memory is too small to hold all the ready processes. II. Because its performance is same as that of the FIFO. III. Because it facilitates putting some set of processes into memory and a choice is made from that. IV. Because it does not allow to adjust the set of in-core processes. Which of the following is true ? (A) I, III and IV (B) I and II (C) III and IV (D) I and III

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Last Answer : (D) I and III

State true or false. i) comparisons precede logical operations in java ii) assignment operations succeed increment operations iii) arithmetic operations succeed comparisons iv) x precede + A) i-true, ii-true, iii-false, iv-true B) i-true, ii-false, iii-true, iv-false C) i-false, ii-true, iii-false, iv-false D) i-true, ii-false, iii-false, iv-true

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Last Answer : A) i-true, ii-true, iii-false, iv-true

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Last Answer : C) i-false, ii-true, iii-false, iv-false

Which of the following characteristics of constructor are true. i) They should be declared in the public section. ii) They are invoked automatically when the objects are created. iii) They do not have return type and void also. iv) We cannot refer their address. v) Constructors cannot virtual. A) Only i, ii, iii and v B) Only ii, iii, iv, and v C) Only i, iii, iv and v D) All i, ii, iii, iv and v

Description : Which of the following characteristics of constructor are true. i) They should be declared in the public section. ii) They are invoked automatically when the objects are created. iii) They do not have return type and void also. ... and v C) Only i, iii, iv and v D) All i, ii, iii, iv and v

Last Answer : D) All i, ii, iii, iv and v

Find the false statement: (A) In Modern Cryptography, symmetric key algorithms use same key both for Encryption and Decryption. (B) The Symmetric cipher DES (Data Encryption Standard) was widely used in the industry for security product. (C) The AES (Advanced Encryption Standard) cryptosystem allows variable key lengths of size 56 bits and 124 bits. (D) Public key algorithms use two different keys for Encryption and Decryption.

Description : Find the false statement: (A) In Modern Cryptography, symmetric key algorithms use same key both for Encryption and Decryption. (B) The Symmetric cipher DES (Data Encryption Standard) was widely used ... and 124 bits. (D) Public key algorithms use two different keys for Encryption and Decryption.

Last Answer : (C) The AES (Advanced Encryption Standard) cryptosystem allows variable key lengths of size 56 bits and 124 bits.

A data file of 1,00,000 characters contains only the characters g-l, with the frequencies as indicated in table: using the variable-length code by Huffman codes, the file can be encoded with (A) 2,52,000 bits (B) 2,64,000 bits (C) 2,46,000 bits (D) 2,24,000 bits

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Last Answer : (D) 2,24,000 bits 

The dual of a Boolean expression is obtained by interchanging (A) Boolean sums and Boolean products (B) Boolean sums and Boolean products or interchanging 0's and 1's (C) Boolean sums and Boolean products and interchanging 0's & 1's (D) Interchanging 0's and 1's

Description : The dual of a Boolean expression is obtained by interchanging (A) Boolean sums and Boolean products (B) Boolean sums and Boolean products or interchanging 0's and 1's (C) Boolean sums and Boolean products and interchanging 0's & 1's (D) Interchanging 0's and 1's

Last Answer : (C) Boolean sums and Boolean products and interchanging 0's & 1's

Which one of the following describes the syntax of prolog program ? I. Rules and facts are terminated by full stop (.) II. Rules and facts are terminated by semicolon (;) III. Variables names must start with upper case alphabets. IV. Variables names must start with lower case alphabets. Codes : (A) I, II (B) III, IV (C) I, III (D) II, IV

Description : Which one of the following describes the syntax of prolog program ? I. Rules and facts are terminated by full stop (.) II. Rules and facts are terminated by semicolon (;) III. Variables names must start with upper case alphabets. ... alphabets. Codes : (A) I, II (B) III, IV (C) I, III (D) II, IV

Last Answer : (C) I, III

Suppose a digitized voice channel is made by digitizing 8 kHz bandwidth analog voice signal. It is required to sample the signal at twice the highest frequency (two samples per hertz). What is the bit rate required, if it is assumed that each sample requires 8 bits? (A) 32 kbps (B) 64 kbps (C) 128 kbps (D) 256 kbps

Description : Suppose a digitized voice channel is made by digitizing 8 kHz bandwidth analog voice signal. It is required to sample the signal at twice the highest frequency (two samples per hertz). What is the bit rate required, if it ... sample requires 8 bits? (A) 32 kbps (B) 64 kbps (C) 128 kbps (D) 256 kbps

Last Answer : (C) 128 kbps

The baud rate of a signal is 600 baud/second. If each signal unit carries 6 bits, then the bit rate of a signal is ................. (A) 3600 (B) 100 (C) 6/600 (D) None of the above

Description : The baud rate of a signal is 600 baud/second. If each signal unit carries 6 bits, then the bit rate of a signal is ................. (A) 3600 (B) 100 (C) 6/600 (D) None of the above

Last Answer : (A) 3600 

What is the bit rate for transmitting uncompressed 800x600 pixel colour frames with 8 bits/pixel at 40 frames/second ? (A) 2.4 Mbps (B) 15.36 Mbps (C) 153.6 Mbps (D) 1536 Mbps

Description : What is the bit rate for transmitting uncompressed 800x600 pixel colour frames with 8 bits/pixel at 40 frames/second ? (A) 2.4 Mbps (B) 15.36 Mbps (C) 153.6 Mbps (D) 1536 Mbps 

Last Answer : (C) 153.6 Mbps Explanation: The number of bits/sec is just 800x600x40x8 or 153.6 Mbps.

An analog signal has a bit rate of 6000 bps and a baud rate of 2000 baud. How many data elements are carried by each signal element ? (A) 0.336 bits/baud (B) 3 bits/baud (C) 120,00,000 bits/baud (D) None of the above

Description : An analog signal has a bit rate of 6000 bps and a baud rate of 2000 baud. How many data elements are carried by each signal element ? (A) 0.336 bits/baud (B) 3 bits/baud (C) 120,00,000 bits/baud (D) None of the above

Last Answer : (B) 3 bits/baud

For the 8-bit word 00111001, the check bits stored with it would be 0111. Suppose when the word is read from memory, the check bits are calculated to be 1101. What is the data word that was read from memory? (A) 10011001 (B) 00011001 (C) 00111000 (D) 11000110

Description : For the 8-bit word 00111001, the check bits stored with it would be 0111. Suppose when the word is read from memory, the check bits are calculated to be 1101. What is the data word that was read from memory? (A) 10011001 (B) 00011001 (C) 00111000 (D) 11000110

Last Answer : (B) 00011001

Assume that we need to download text documents at the rate of 100 pages per minute. A page is an average of 24 lines with 80 characters in each line and each character requires 8 bits. Then the required bit rate of the channel is ................ (A) 1.636 Kbps (B) 1.636 Mbps (C) 2.272 Mbps (D) 3.272 Kbps

Description : Assume that we need to download text documents at the rate of 100 pages per minute. A page is an average of 24 lines with 80 characters in each line and each character requires 8 bits. Then the required bit rate of the channel is ... ...... (A) 1.636 Kbps (B) 1.636 Mbps (C) 2.272 Mbps (D) 3.272 Kbps

Last Answer : Answer: Marks given to all

A multiplexer combines four 100-Kbps channels using a time slot of 2 bits. What is the bit rate? (A) 100 Kbps (B) 200 Kbps (C) 400 kbps (D) 1000 Kbps

Description : A multiplexer combines four 100-Kbps channels using a time slot of 2 bits. What is the bit rate? (A) 100 Kbps (B) 200 Kbps (C) 400 kbps (D) 1000 Kbps

Last Answer : (C) 400 kbps

________ is an input device that accepts input when the user places a fingertip on the computer screen. A. Joy Stick B. Light Pen C. Trackball D. Touch Screen

Description : ________ is an input device that accepts input when the user places a fingertip on the computer screen. A. Joy Stick B. Light Pen C. Trackball D. Touch Screen

Last Answer : D. Touch Screen

Consider the following two commands C1 and C2 on the relation R from an SQL database: C1: drop table R; C2: delete from R; Which of the following statements is TRUE? I. Both C1 and C2 delete the schema for R. II. C2 retains relation R, but deletes all tuples in R. III. C1 deletes not only all tuples of R, but also the schema for R. (A) I only (B) I and II only (C) II and III only (D) I, II and III

Description : Consider the following two commands C1 and C2 on the relation R from an SQL database:  C1: drop table R; C2: delete from R; Which of the following statements is TRUE? I. Both C1 and C2 delete the schema for R. II. C2 ... R. (A) I only (B) I and II only (C) II and III only (D) I, II and III

Last Answer : (C) II and III only

Which of the following statement is true? i) An address with all bits 1 is interpreted as all networks or all hosts. ii) The class A network 128.0.0.0 is defined as the loopback network. A) i only B) ii only C) Both A and B D) None of the above

Description : Which of the following statement is true? i) An address with all bits 1 is interpreted as all networks or all hosts. ii) The class A network 128.0.0.0 is defined as the loopback network. A) i only B) ii only C) Both A and B D) None of the above

Last Answer : A) i only

Which one of the following is decimal value of a signed binary number 1101010, if it is in 2's complement form? (A) -42 (B) - 22 (C) -21 (D) -106

Description : Which one of the following is decimal value of a signed binary number 1101010, if it is in 2's complement form? (A) -42 (B) - 22 (C) -21 (D) -106

Last Answer : (B) - 22

What steps shall be required to rotate an object about the point P1 (as shown in fig.1) and its placement such that what was at P1 is now reduced and is at P2 (as shown in fig.2). Image I. Translate P1 to origin II. Scale as required III. Rotate IV. Translate to the final position P2. (A) I,II and III (B) II,III and IV (C) I,III and IV (D) All of the above

Description : What steps shall be required to rotate an object about the point P1 (as shown in fig.1) and its placement such that what was at P1 is now reduced and is at P2 (as shown in fig.2). I. Translate P1 to origin II. ... (A) I,II and III (B) II,III and IV (C) I,III and IV (D) All of the above

Last Answer : Answer: Marks given to all

Which of the following statement(s) is/are correct with reference to curve generation? I. Hermite curves are generated using the concepts of interpolation. II. Bezier curves are generated using the concepts of approximation. III. The Bezier curves lies entirely within the convex hull of its control points. IV. The degree of Bezier curve does not depend on the number of control points. (A) I, II and IV only (B) II and III only (C) I and II only (D) I, II and III only

Description : Which of the following statement(s) is/are correct with reference to curve generation? I. Hermite curves are generated using the concepts of interpolation. II. Bezier curves are generated using the concepts of approximation. III. The ... (B) II and III only (C) I and II only (D) I, II and III only

Last Answer : (D) I, II and III only

Consider the following database table having A, B, C and D as its four attributes and four possible candidate keys (I, II, III and IV) for this table: Image I: {B} II: {B, C} III: {A, D} IV: {C, D} If different symbols stand for different values in the table (e.g., d1 is definitely not equal to d2), then which of the above could not be the candidate key for the database table? (A) I and III only (B) III and IV only (C) II only (D) I only

Description : Consider the following database table having A, B, C and D as its four attributes and four possible candidate keys (I, II, III and IV) for this table: I: {B} II: {B, C} III: {A, D} IV: {C, D} If ... the database table? (A) I and III only (B) III and IV only (C) II only (D) I only

Last Answer : (C) II only

Net returns a). Gross return – Fixed cost – Variable cost b). Gross return – Variable cost c). Gross return – Fixed cost d). Gross return – Total cost i) a & b, ii) a & c, iii) a & d, iv) b & d

Description : Net returns a). Gross return – Fixed cost – Variable cost b). Gross return – Variable cost c). Gross return – Fixed cost d). Gross return – Total cost i) a & b, ii) a & c, iii) a & d, iv) b & d

Last Answer : iii) a & d

Match the following HTTP status code to their respective definitions. i) 400 a) OK ii) 500 b) Not found iii) 200 c) Continue iv) 100 d) Internal server error A) i-b, ii-d, iii-a, iv-c B) i-a, ii-b, iii-c, iv-d C) i-b, ii-c, iii-a, iv-d D) i-b, ii-a, iii-c, iv-d

Description : Match the following HTTP status code to their respective definitions. i) 400 a) OK ii) 500 b) Not found iii) 200 c) Continue iv) 100 d) Internal server error A) i-b, ii-d, iii-a, iv-c B) i-a, ii-b, iii-c, iv-d C) i-b, ii-c, iii-a, iv-d D) i-b, ii-a, iii-c, iv-d

Last Answer : A) i-b, ii-d, iii-a, iv-c

Which of the following operates cannot be overloaded? i) Size of operator (sizeof) ii) Scope resolution Operator iii) Conditional operator (?:) iv) Assignment Operator (=) A) i, ii, iii only B) ii, iii, iv only C) i, iii, iv only D) all i, ii, iii, iv

Description : Which of the following operates cannot be overloaded? i) Size of operator (sizeof) ii) Scope resolution Operator iii) Conditional operator (?:) iv) Assignment Operator (=) A) i, ii, iii only B) ii, iii, iv only C) i, iii, iv only D) all i, ii, iii, iv

Last Answer : A) i, ii, iii only