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কম্পিউটার সায়েন্স এন্ড ইঞ্জিনিয়ারিং

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26061. CQ / Written2015-2016 · Question 9b

9. (b) A battery of unknown e.m.f is connected to a circuit as shown below. The voltage drop across the $8\ \Omega$ resistor is 20 V. What will be the current reading in the ammeter? [একটি অজানা e.m.f ব্যাটারি নিচের চিত্রানুযায়ী সংযুক্ত। $8\ \Omega$ রোধকের voltage drop হলো 20 V। Ammeter এর তড়িৎ প্রবাহ নির্ণয় কর।]

Question diagram

CQ / Written solution

\[I=20/8=2.5\,\mathrm A\]

Ideal voltmeter ও ammeter ধরে, current 11 Ω এবং (15 + 13) Ω branch-এ ভাগ হয়।

\[I_A=2.5\frac{11}{11+15+13}=\boxed{0.70513\,\mathrm A}\]

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26062. CQ / Written2015-2016 · Question 10.1

Source ambiguity: see solution note.

(i) What will be the output of the following? [নিম্নের প্রোগ্রামটির আউটপুট কি?]

main () {
int i = 1;
char c = 'a';
printf ("%d", i*c) ;
printf ("%d", i*(c+2)) ;
}
  1. A,C
  2. 65,67
  3. 1,3
  4. C,A

CQ / Written solution

ASCII-তে 'a' = 97 এবং 'c' = 99। দুই printf-এর মধ্যে separator নেই, তাই output 9799; কোনো option সঠিক নয়।

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26063. MCQ2015-2016 · Question 10.2

(ii) Find the error in the following C++ block of code. [নিম্নোক্ত C++ কোড ব্লকের ভুল নির্ণয় কর।]

if (x = 100)
cout << "x is 100";
a.
100 should be enclose in quotation
b.
There is semicolon at the end of first line
c.
Equals to operator mistake
d.
Variable x should be inside quotation

Correct answer: c

Comparison-এর জন্য == দরকার; x = 100 একটি valid assignment, কিন্তু intended condition নয়।

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26064. CQ / Written2015-2016 · Question 10.3

Source ambiguity: see solution note.

(iii) What will be the output of the following C program? [নিম্নোক্ত C প্রোগ্রামটির আউটপুট কি?]

main () { int i = 5; printf ("%d", i=++i==6); }
  1. 0
  2. 7
  3. 6
  4. 1

CQ / Written solution

প্রদত্ত C expression i=++i==6 একই full expression-এ i দুইবার modify করে; C-তে undefined behavior, তাই 1 নিশ্চিত উত্তর নয়।

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26065. MCQ2015-2016 · Question 10.4

(iv) Which class of IP address provides a maximum of only 254 host addresses per network ID? [IP address এর কোন class 254 টি host address প্রতিটি network এ জোগান দেয়?]

a.
Class A
b.
Class B
c.
Class C
d.
Class D

Correct answer: c

Classful Class C-তে /24 এবং 254 usable host address।

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26066. MCQ2015-2016 · Question 10.5

(v) Which one is the feature for simplex transmission? [Simplex transmission এর বৈশিষ্ট্য কোনটি?]

a.
Data format is simple
b.
Data transmission is one way
c.
Data can be transmitted to small distance only
d.
None of the above

Correct answer: b

Simplex-এ data একদিকে যায়।

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26067. MCQ2015-2016 · Question 10.6

vi) A key represent relation between tables is called ----- [টেবিল সমূহের মধ্যে রিলেশন তৈরীর জন্য যে key ব্যবহার করা হয় তাকে বলে ----- ]

a.
Primary key
b.
Secondary key
c.
Index key
d.
Foreign key

Correct answer: d

Foreign key referential relationship প্রতিষ্ঠা করে।

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26068. MCQ2015-2016 · Question 10.7

(vii) If which scheduling is time quantum defined? [কোন Scheduling এ সময় কোয়ান্টাম ব্যবহৃত হয়?]

a.
Shortest job first scheduling
b.
Round robin scheduling
c.
Priority scheduling
d.
Multi-level scheduling

Correct answer: b

Round-robin scheduling-এ time quantum থাকে।

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26069. MCQ2015-2016 · Question 10.8

(viii) If every $u$ in G is adjacent to every other node $v$ in G, the graph is said to be : [যদি কোন graph G এর প্রতিটি নোড $u$ অন্য সব নোড $v$ এর সাথে সংযুক্ত থাকে তবে তাকে বলেঃ]

a.
Isolated
b.
Complete
c.
Finite
d.
strongly connected

Correct answer: b

সব পৃথক vertex pair adjacent হলে complete graph।

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26070. MCQ2015-2016 · Question 10.9

(ix) The microprocessor 8086 has -----. [8086 microprocessor এ আছে -----.]

a.
8-bit Data Bus and 8-bit Address Bus
b.
8-bit Data Bus and 16-bit Address Bus
c.
8-bit Data Bus and 20-bit Address Bus
d.
16-bit Data Bus and 20-bit Address Bus

Correct answer: d

8086: 16-bit data bus ও 20-bit address bus।

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