Computer Science

Q.16 Parent class of all Java classes is
(A) java.lang.system (B) java.lang.object
(C) java.lang.class (D) java.lang.reflect.object
Ans: B

Parent class of all Java classes is java.lang.object.

Q.17 Exceptions of type error in JAVA are handled by
(A) User program (B) Java run time environment
(C) Operating system kernel (D) Interrupt
Ans: B

Exceptions of type error in JAVA are handled by JAVA run time environment.

Q.18 Error detecting method that can detect more errors without increasing additional information in each packet is
(A) checksum (B) even parity mechanism
(C) CRC (D) odd parity mechanism.
Ans: C

Error detecting method that can detect more errors without increasing additional information in each packet is CRC.

Q.19 A Network uses a star topology if
(A) Computers are ar ranged in a closed loop.
(B) All computers at tach to a cent ral point .
(C) All computers at tach to a single long cable.
(D) Computers at tach to multiple hierarchical cables.
Ans: B

A Network uses a star topology if all computers attach to a central point .

Q.20 MTU is specified by
(A) IP Datagram size (B) Hardware technology
(C) TCP Segment size (D) None of the above.
Ans: B

MTU is specified by hardware technology.

Q.21 Network address prefixed by 1110 is a
(A) Class A address (B) Mul t icast address
(C) Class B address (D) Reserve address.
Ans: B

Network address prefixed by 1110 is a multicast address.

Q.22 FTP does not use
(A) Two transfer mode.
(B) Control connect ion to remote computer before file can be transferred.
(C) User Datagram Protocol .
(D) Authorization of a user through login and password verification.
Ans: C

FTP does not use User Datagram Protocol.

Q.23 A Header in CGI document can represent
(A) format of the document
(B) location if document used to different URL
(C) both (A) & (B)
(D) None of the above.
Ans: B

A header in CGI document can represent format of the document and the location if document used to different URL.

Q.24 127.0.0.1 is a
(A) limited broadcast address (B) direct broadcast address
(C) multicast address (D) loop-back address
Ans: D

127.0.0.1 is a loop-back address.

Q.25 In cyclic redundancy checking CRC is the
(A) divisor (B) quotient .
(C) dividend (D) remainder.
Ans: D

In cyclic redundancy checking CRC is the remainder.

Q.26 Which one of the following uses the greatest number of layers in the OSI model?
(A) Bridge (B) Repeater.
(C) Router. (D) Gateway.
Ans: D

Gateway uses the greatest number of layers in the OSI model.

Q.27 Which of the following 802 standard provides for a collision free protocol?
(A) 802.2 (B) 802.3
(C) 802.5 (D) 802.6
Ans: C

802.5 standards provides for a collision free protocol.

Q.28 The addressing especially used by Transport Layer is
(A) Station address (B) Network address
(B) Application port address (D) Dialog address
Ans: B

The addressing specially used by transport layer is application port address.

Q.29 Which one of the following is an error reporting protocol?
(A) ARP (B) ICMP
(C) TCP (D) UDP
Ans: B

ICMP is an error reporting protocol.

Q.30 Which type of web document is run at the client site
(A) Static (B) Dynamic
(C) Active (D) All of the above
Ans: C

Active web document is run at client side.