8. What is the name given to the molecular-scale computer?
A. Femtocomputer
B. Nanocomputer
C. Supercomputer
D. Microcomputer
✅ The correct answer is option B.
11. Which language was devised by Dr. Seymour Aubrey Papert?
A. APL
B. COBOL
C. LOGO
D. FORTRAN
✅ The correct answer is option C.
13. The imitation of one device or system by another is
A. Simulation
B. Emulation
C. Resilience
D. Compaction
✅ The correct answer is option B.
16. By default, your documents print in ________ mode
A. Page setup
B. Portrait
C. Landscape
D. Print preview
✅ The correct answer is option B.
19. A ‘number crunching’ computer is one that can handle
A. large spreadsheets
B. large alphanumeric data
C. large volume of numbers
D. only numbers
✅ The correct answer is option C.
22. A device invented by Dr. Bobeck in 1966, for mass storage of data is
A. Punched paper tape
B. Magnetic bubble storage
C. Magnetic tape
D. Magnetic disk
✅ The correct answer is option B.
25. A type of core store that has a lower access time than the devices used for working store in the same processor is known as
A. core memory
B. buffer
C. fast core
D. address register
✅ The correct answer is option C.
127. A can do a certain work in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in:
[A]. 15 days
[B]. 20 days
[C]. 25 days
[D]. 30 days
✅ The correct answer is option C.
(A + B)’s 1 day’s work =
1
(A + B)’s 1 day’s work =
1
10
C’s 1 day’s work =
1
50
(A + B + C)’s 1 day’s work =
1
+
1
=
6
=
3
. …. (i)
10
50
50
25
A’s 1 day’s work = (B + C)’s 1 day’s work …. (ii)
From (i) and (ii), we get: 2 x (A’s 1 day’s work) =
3
25
A’s 1 day’s work =
3
.
50
B’s 1 day’s work
1
–
3
=
2
=
1
.
10
50
50
25
So, B alone could do the work in 25 days.
129. A machine P can print one lakh books in 8 hours, machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 A.M. while machine P is closed at 11 A.M. and the remaining two machines complete work. Approximately at what time will the work (to print one lakh books) be finished ?
[A]. 11:30 A.M.
[B]. 12 noon
[C]. 12:30 P.M.
[D]. 1:00 P.M.
✅ The correct answer is option D.
(P + Q + R)’s 1 hour’s work =
(P + Q + R)’s 1 hour’s work =
1
+
1
+
1
=
37
.
8
10
12
120
Work done by P, Q and R in 2 hours =
37
x 2
=
37
.
120
60
Remaining work =
1 –
37
=
23
.
60
60
(Q + R)’s 1 hour’s work =
1
+
1
=
11
.
10
12
60
Now,
11
work is done by Q and R in 1 hour.
60
So,
23
work will be done by Q and R in
60
x
23
=
23
hours 2 hours.
60
11
60
11
So, the work will be finished approximately 2 hours after 11 A.M., i.e., around 1 P.M.
131. A works twice as fast as B. If B can complete a work in 12 days independently, the number of days in which A and B can together finish the work in :
[A]. 4 days
[B]. 6 days
[C]. 8 days
[D]. 18 days
✅ The correct answer is option A.
Ratio of rates of working of A and B = 2 : 1.
So, ratio of times taken = 1 : 2.
Ratio of rates of working of A and B = 2 : 1.
So, ratio of times taken = 1 : 2.
B’s 1 day’s work =
1
.
12
A’s 1 day’s work =
1
; (2 times of B’s work)
6
(A + B)’s 1 day’s work =
1
+
1
=
3
=
1
.
6
12
12
4
So, A and B together can finish the work in 4 days.