How many control keys are there on the key board ?

How many control keys are there on the key board ?
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1 Answer

Answer :

Usually there are 2 o'clock. In some cases it is 1 o'clock.
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A key-board has at least: (A) 91 keys (B) 101 keys (C) 111 keys (D) 121 keys

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My f key sticks and doesn't press down like the rest of the keys . It does type but I'm not sure why it won't press down. It?

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Suppose you want to send in the mail a valuable object to a friend. You have a box which is big enough to hold the object. The box has a locking ring which is large enough to have a lock attached and you have several locks with keys. However, your friend does not have the key to any lock that you have. You cannot send the key in an unlocked box since it may be stolen or copied. How do you send the valuable object, locked, to your friend - so it may be opened by your friend? -Riddles

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Last Answer : Send the box with a lock attached and locked. Your friend attaches his or her own lock and sends the box back to you. You remove your lock and send it back to your friend. Your friend may then remove the lock she or he put on and open the box.

You want to send a valuable object to a friend. You have a box which is more than large enough to contain the object. You have several locks with keys. The box has a locking ring which is more than large enough to have a lock attached. But your friend does not have the key to any lock that you have. How do you do it? Note that you cannot send a key in an unlocked box, since it might be copied. -Riddles

Description : You want to send a valuable object to a friend. You have a box which is more than large enough to contain the object. You have several locks with keys. The box has a locking ring which is more than ... do it? Note that you cannot send a key in an unlocked box, since it might be copied. -Riddles

Last Answer : Attach a lock to the ring. Send it to her. She attaches her own lock and sends it back. You remove your lock and send it back to her. She removes her lock.

Suppose you want to send in the mail a valuable object to a friend. You have a box which is big enough to hold the object. The box has a locking ring which is large enough to have a lock attached and you have several locks with keys. However, your friend does not have the key to any lock that you have. You cannot send the key in an unlocked box since it may be stolen or copied. How do you send the valuable object, locked, to your friend - so it may be opened by your friend? -Riddles

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Describe how to retrieve the ASCII key code from a keystroke. How would you retrieve key combinations for non-ASCII keys?

Description : Describe how to retrieve the ASCII key code from a keystroke. How would you retrieve key combinations for non-ASCII keys?

Last Answer : Keystrokes can be intercepted by handling the KeyPress and KeyDown events. Both of these events relay information to their handling methods in the form of their EventArgs. The KeyPressEventArgs, ... you would handle the KeyDown event and use the properties exposed by the KeyEventArgs instance.

What is an encryption system that uses two keys: a public key that everyone can have and a private key for only the recipient? a. Encryption b. Public key encryption c. Intrusion‐detection software d. Security‐auditing software

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Last Answer : b. Public key encryption

Public key encryption uses multiple keys. One key is used to encrypt data, while another is used to decrypt data. The key used to encrypt data is called the _____ key, while the key used to decrypt data is called the _____ key. a. encryption, decryption b. private, public c. encryption, public d. public, private

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Last Answer : d. public, private

In cheque payment protocol, the purchase order form is signed by purchaser using a. his public key b. his private key c. his private key using his signature hardware d. various public keys

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Last Answer : c. his private key using his signature hardware  

The responsibility of a certification authority for digital signature is to authenticate the a. hash function used b. private keys of subscribers c. public keys of subscribers d. key used in DES

Description : The responsibility of a certification authority for digital signature is to authenticate the a. hash function used b. private keys of subscribers c. public keys of subscribers d. key used in DES 

Last Answer : c. public keys of subscribers  

Public key system is useful because a. it uses two keys. b. there is no key distribution problem as public key can be kept in a commonly accessible database. c. private key can be kept secret. d. it is a symmetric key system.

Description : Public key system is useful because a. it uses two keys. b. there is no key distribution problem as public key can be kept in a commonly accessible database. c. private key can be kept secret. d. it is a symmetric key system. 

Last Answer : b. there is no key distribution problem as public key can be kept in a commonly accessible database.  

Public key encryption method is a system a. which uses a set of public keys one for each participant in e-Commerce b. in which each person who wants to communicate has two keys; a private key known to him only and a public key which is publicized to enable others to send message to him. c. which uses the RSA coding system. d. which is a standard for use in e-Commerce.

Description : Public key encryption method is a system a. which uses a set of public keys one for each participant in e-Commerce b. in which each person who wants to communicate has two keys; a private key known to him ... him. c. which uses the RSA coding system. d. which is a standard for use in e-Commerce.  

Last Answer : b. in which each person who wants to communicate has two keys; a private key known to him only and a public key which is publicized to enable others to send message to him.

Triple DES a. is a symmetric key encryption method b. guarantees excellent security c. is implementable as a hardware VLSI chip d. is public key encryption method with three keys.

Description : Triple DES a. is a symmetric key encryption method b. guarantees excellent security c. is implementable as a hardware VLSI chip d. is public key encryption method with three keys. 

Last Answer : b. guarantees excellent security  

DES works by using a. permutation and substitution on 64 bit blocks of plain text b. only permutations on blocks of 128 bits c. exclusive ORing key bits with 64 bit blocks d. 4 rounds of substitution on 64 bit blocks with 56 bit keys

Description : DES works by using a. permutation and substitution on 64 bit blocks of plain text b. only permutations on blocks of 128 bits c. exclusive ORing key bits with 64 bit blocks d. 4 rounds of substitution on 64 bit blocks with 56 bit keys

Last Answer : a. permutation and substitution on 64 bit blocks of plain text 

By symmetric key encryption we mean a. one private key is used for both encryption and decryption b. private and public key used are symmetric c. only public keys are used for encryption d. only symmetric key is used for encryption

Description : By symmetric key encryption we mean a. one private key is used for both encryption and decryption b. private and public key used are symmetric c. only public keys are used for encryption d. only symmetric key is used for encryption

Last Answer : D

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.

Based on the cardinality ratio and participation ............... associated with a relationship type, choose either the Foreign Key Design, the Cross Referencing Design or Mutual Referencing Design. (A) Entity (B) Constraints (C) Rules (D) Keys

Description : Based on the cardinality ratio and participation ............... associated with a relationship type, choose either the Foreign Key Design, the Cross Referencing Design or Mutual Referencing Design. (A) Entity (B) Constraints (C) Rules (D) Keys

Last Answer : (B) Constraints

If h is chosen from a universal collection of hash functions and is used to hash n keys into a table of size m, where n ≤ m, the expected number of collisions involving a particular key K is (A) less than 1 (B) less than lg n (C) greater than 1 (D) greater than lg n

Description : If h is chosen from a universal collection of hash functions and is used to hash n keys into a table of size m, where n ≤ m, the expected number of collisions involving a particular key K is (A) less than 1 (B) less than lg n (C) greater than 1 (D) greater than lg n

Last Answer : (A) less than 1

Which of the following statements is FALSE about weak entity set ? (A) Weak entities can be deleted automatically when their strong entity is deleted. (B) Weak entity set avoids the data duplication and consequent possible inconsistencies caused by duplicating the key of the strong entity. (C) A weak entity set has no primary keys unless attributes of the strong entity set on which it depends are included. (D) Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.

Description : Which of the following statements is FALSE about weak entity set ? (A) Weak entities can be deleted automatically when their strong entity is deleted. (B) Weak entity set avoids the data ... weak entity set are not partitioned according to their relationship with tuples in a strong entity set.

Last Answer : (D) Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.

If there are N people in the world and are using secret key encryption/decryption for privacy purpose, then number of secret keys required will be: (A) N (B) (N-1) (C) N(N-1)/2 (D) N(N+1)/2

Description : If there are N people in the world and are using secret key encryption/decryption for privacy purpose, then number of secret keys required will be: (A) N (B) (N-1) (C) N(N-1)/2 (D) N(N+1)/2

Last Answer : (C) N(N-1)/2 

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

If h is chosen from a universal collection of hash functions and is used to hash n keys into a table of size m, where n≤m, the expected number of collisions involving a particular key x is less than ................... (1) 1 (2) 1/n (3) 1/m (4) n/m

Description : If h is chosen from a universal collection of hash functions and is used to hash n keys into a table of size m, where n≤m, the expected number of collisions involving a particular key x is less than ................... (1) 1 (2) 1/n (3) 1/m (4) n/m

Last Answer : Answer: 1

The key electronic component in a communications satellite is the A. telemetry equipment B. on-board computer C. command and control system D. transponder

Description : The key electronic component in a communications satellite is the A. telemetry equipment B. on-board computer C. command and control system D. transponder

Last Answer : D. transponder

What keys are used to permanently delete programs or files ?

Description : What keys are used to permanently delete programs or files ?

Last Answer : Shift + Del keys are used to permanently delete programs or files .

How many keys are on the keyboard ?

Description : How many keys are on the keyboard ?

Last Answer : Usually the keyboard has 104 to 110 keys.

What is a keyboard ? How many types of keyboards and what are the keys ?

Description : What is a keyboard ? How many types of keyboards and what are the keys ?

Last Answer : Keyboard is one of the main input devices of computer. Almost all the data for processing is input through the keyboard. And most of the instruction work is done with the help of keyboard. Again, ... Keyboard with 64 buttons , 3. Extended keyboard. But now 104 keyboard keyboard is being used more.

How many types of keyboard keys ?

Description : How many types of keyboard keys ?

Last Answer : Keyboard keys - 6 types.

In the United Kingdom, the Regulation of Investigatory Powers Act gives UK police the powers to force suspects to _____that protect encryption keys: a) Hand over passwords b) Decrypt Files c) Both of Above d) None of These

Description : In the United Kingdom, the Regulation of Investigatory Powers Act gives UK police the powers to force suspects to _____that protect encryption keys: a) Hand over passwords b) Decrypt Files c) Both of Above d) None of These

Last Answer : c) Both of Above