121. Firewall is a device used for filtering......

Password

Virus

File

Packet

122. Which of the following protects a computer system form hacking..?/নিচের কোনটি একটি কম্পিউটার হ্যাকিং থেকে রক্ষা করে?

Sort

backup

anti-virus

firewall

123. Back up প্রোগ্রাম বলতে কী বোঝাতে হয়?

নির্ধারিত ফাইল কপি করা

আগের প্রোগ্রামের ফিরে যাওয়া

সর্বশেষ পরিবর্তন undo করা

কোনটিই নয়

124. What is the best way to protect your hard drive data?

Regular backups

Periodically defragment it

Run scandist at least once a weak

None of the above

125. কোন কার্ডের বিপরীতে ব্যাংক থেকে ঋন পাওয়া যায়?

Credit card

Debit card

ATM Card

Smart Card

126. ATM means____

Automatated transit Machine

Automated Teller Machine

Aysnchronous Teller Machine

Accurute Transmission Machanism

127. A certain hard disk has a data transfer rate of 20 MB/sec. How much time is required to transfer 5 megabyte data from this disk to memory?

20 sec

1 sec

0.5 sec

0.25sec

128. In magnetic storage devices tracjs are divided into__

Sbtracks

Supertracks

segments

sectors

129. In computers, bus width is measured in __

Bits

Characters

Bytes

Megabytes

130. In computers, bus width is measured in __

Bits

Characters

Bytes

Megabytes

131. Which one of the foolowing is not true of valatile memory?

CPU can read any address

Random Accesss Memory

Speeds measured in r.p.m

Required power to hold data

132. Which one of the following is an example of nonvolatile memory?

ROM

POST

BIOS

all of these

133. When a document is wider than it is long , which of the following page orientations should be selected?

Landscape

Portrait

Legal

Tabloid

134. In the cpu, the ...... unit controls resources in the computer?

Command

Arithmetic Logic

Memory

Control

135. In a Computer, text codes coverts letters into___

Decimal Numbers

Magnetic pulse

Binary Format

Graphics

136. In binary number system, each bit represents a-----

Character

Switch

Signal

Number

137. Among the computer generations, www, HTML, DVD, iPad etc. are some of the popular inventions of which generation?

3rd

4th

5th

6th

138. In Ms word excel, what is the short cut key to replace a data with another in a sheet?

Ctrl+F

Ctrl+R

Ctrl+H

Ctrl+Shift+R

139. which of the following type of printer spays ink onto paper?

Laser

Dot Matrix

Ink-jet

all of these

140. Which of the following types of techology lests computers use light as a source of Input?

Operative

Optical

Optimal

Optional