JAMB Computer Science Past Questions & Answers - Page 19

91.

When records are given a new value, it is called

A.

updation

B.

insertion

C.

deletion

D.

retrieval

Correct answer is A

When records are given a new value, it is called 'updation'. This is a process in database management where an existing record is modified with new data. 'Insertion' is adding a new record, 'deletion' is removing a record, and 'retrieval' is fetching data from the database

92.

Which of the following is used for modulation and demodulation ?

A.

Gateway

B.

Protocol

C.

Modem

D.

Multiplex

Correct answer is C

A modem(modulator-demodulator) is a hardware device that connects a computer or router to a broadband network

93.

Modem computers Compared to earlier computers are ?

A.

less reliable

B.

faster and larger

C.

larger and stronger

D.

faster and smaller

Correct answer is D

No explanation has been provided for this answer.

94.

One-millionth of a second is also referred to as

A.

nanosecond

B.

microsecond

C.

millisecond

D.

picosecond

Correct answer is B

No explanation has been provided for this answer.

95.

Which of the following is not a type of computer on the basis of operation?

A.

Remote

B.

Hybrid

C.

Analog

D.

Digital

Correct answer is A

Every other option but option A, is a type of computer based on the basis of operation