MCQOPTIONS
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MCQOPTIONS
This section includes 87 Mcqs, each offering curated multiple-choice questions to sharpen your Operating System knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Command lines entered at the console are limited to about ________ bytes.a) 3000b) 4095c) 5000d) 6000 10._____ text editor provides more general support mechanisms via ESS for working interactively with R. |
| A. | 3000b) 4095c) 5000d) 6000 10._____ text editor provides more general support mechanisms via ESS for working interactively with R.a) EAC |
| B. | 4095c) 5000d) 6000 10._____ text editor provides more general support mechanisms via ESS for working interactively with R.a) EACb) Emacs |
| C. | 5000d) 6000 10._____ text editor provides more general support mechanisms via ESS for working interactively with R.a) EACb) Emacsc) Shell |
| D. | 6000 10._____ text editor provides more general support mechanisms via ESS for working interactively with R.a) EACb) Emacsc) Shelld) ECAPView Answer |
| Answer» C. 5000d) 6000 10._____ text editor provides more general support mechanisms via ESS for working interactively with R.a) EACb) Emacsc) Shell | |
| 2. |
If a command is not complete at the end of a line, R will give a different prompt, by default it is ____________ |
| A. | * |
| B. | – |
| C. | + |
| D. | / |
| Answer» D. / | |
| 3. |
Which of the following statement is alternative to _________ |
| A. | help(solve) |
| B. | print(solve) |
| C. | bind(solve) |
| D. | matrix(solv |
| E. | print(solve)c) bind(solve)d) matrix(solve)View Answer |
| Answer» B. print(solve) | |
| 4. |
Which of the following will start the R program? |
| A. | $ R |
| B. | > R |
| C. | * R |
| D. | @ R |
| Answer» B. > R | |
| 5. |
Which of the following is default prompt for UNIX environment? |
| A. | > |
| B. | >> |
| C. | < |
| D. | << |
| Answer» B. >> | |
| 6. |
The most convenient way to use R is at a graphics workstation running a ________ system. |
| A. | windowing |
| B. | running |
| C. | interfacing |
| D. | matrix |
| Answer» B. running | |
| 7. |
A language which has the capability to generate new data types are called ________________ |
| A. | Extensible |
| B. | Overloaded |
| C. | Encapsulated |
| D. | Reprehensible |
| Answer» B. Overloaded | |
| 8. |
Which of the following is called extraction/get from operator? |
| A. | << |
| B. | >> |
| C. | > |
| D. | < |
| Answer» C. > | |
| 9. |
Which of the following is called insertion/put to operator? |
| A. | << |
| B. | >> |
| C. | > |
| D. | < |
| Answer» B. >> | |
| 10. |
Who created C++? |
| A. | Bjarne Stroustrup |
| B. | Dennis Ritchie |
| C. | Ken Thompson |
| D. | Brian Kernighan |
| Answer» B. Dennis Ritchie | |
| 11. |
Which of the following escape sequence represents tab? |
| A. | \t |
| B. | \t\r |
| C. | \b |
| D. | \a |
| Answer» B. \t\r | |
| 12. |
Which of the following escape sequence represents carriage return? |
| A. | \r |
| B. | \n |
| C. | \n\r |
| D. | \c |
| Answer» B. \n | |
| 13. |
What are the escape sequences? |
| A. | Set of characters that convey special meaning in a program |
| B. | Set of characters that whose use are avoided in C++ programs |
| C. | Set of characters that are used in the name of the main function of the program |
| D. | Set of characters that are avoided in cout statements |
| Answer» B. Set of characters that whose use are avoided in C++ programs | |
| 14. |
Which function is used to write a single character to console in C++? |
| A. | cout.put(ch) |
| B. | cout.putline(ch) |
| C. | write(ch) |
| D. | printf(ch) |
| Answer» B. cout.putline(ch) | |
| 15. |
Which function is used to read a single character from the console in C++? |
| A. | cin.get(ch) |
| B. | getline(ch) |
| C. | read(ch) |
| D. | scanf(ch) |
| Answer» B. getline(ch) | |
| 16. |
What are the formal parameters in C++? |
| A. | Parameters with which functions are called |
| B. | Parameters which are used in the definition of the function |
| C. | Variables other than passed parameters in a function |
| D. | Variables that are never used in the function |
| Answer» C. Variables other than passed parameters in a function | |
| 17. |
What are the actual parameters in C++? |
| A. | Parameters with which functions are called |
| B. | Parameters which are used in the definition of a function |
| C. | Variables other than passed parameters in a function |
| D. | Variables that are never used in the function |
| Answer» B. Parameters which are used in the definition of a function | |
| 18. |
Which of the following is used for comments in C++? |
| A. | // comment |
| B. | /* comment */ |
| C. | both // comment or /* comment */ |
| D. | // comment */ |
| Answer» D. // comment */ | |
| 19. |
Which of the following is called address operator? |
| A. | * |
| B. | & |
| C. | _ |
| D. | % |
| Answer» C. _ | |
| 20. |
Which of the following is a correct identifier in C++? |
| A. | 7var_name |
| B. | 7VARNAME |
| C. | VAR_1234 |
| D. | $var_name |
| Answer» D. $var_name | |
| 21. |
Which of the following is the correct syntax of including a user defined header files in C++? |
| A. | #include <userdefined.h> |
| B. | #include <userdefined> |
| C. | #include “userdefined” |
| D. | #include [userdefined] |
| Answer» D. #include [userdefined] | |
| 22. |
The radiation efficiency for antenna having radiation resistance 36.15Ω and loss resistance 0.85Ω is given by ________ |
| A. | 0.977 |
| B. | 0.799 |
| C. | 0.997 |
| D. | 0.779 |
| Answer» B. 0.799 | |
| 23. |
The axis of back lobe makes an angle of 180° with respect to the beam of an antenna.a) Trueb) False 10.Radiation resistance of a half-wave dipole is ______ |
| A. | Trueb) False 10.Radiation resistance of a half-wave dipole is ______a) 36.56Ω |
| B. | False 10.Radiation resistance of a half-wave dipole is ______a) 36.56Ωb) 18.28Ω |
| C. | 73.12Ω |
| D. | 40.24ΩView Answer |
| Answer» B. False 10.Radiation resistance of a half-wave dipole is ______a) 36.56Ωb) 18.28Ω | |
| 24. |
Relation between directivity and effective area of transmitting and receiving antenna is ________ |
| A. | Dt At=Dr Ar |
| B. | Dt Ar=Dr At |
| C. | At Dt=∈Dr Ar |
| D. | Dt At=∈Dr Ar |
| Answer» C. At Dt=∈Dr Ar | |
| 25. |
Radiation resistance of a Hertzian dipole of length λ/8 is ________ |
| A. | 12.33Ω |
| B. | 8.54Ω |
| C. | 10.56Ω |
| D. | 13.22Ω |
| Answer» B. 8.54Ω | |
| 26. |
Equivalent circuit representation of an antenna is ______ |
| A. | Series R, L, C |
| B. | Parallel R, L, C |
| C. | Series R, L parallel to C |
| D. | Parallel R, C series to L |
| Answer» B. Parallel R, L, C | |
| 27. |
The equivalent area when multiplied by the instant power density which leads to free radiation of power at antenna is called as _______ |
| A. | Loss area |
| B. | Scattering area |
| C. | Captured area |
| D. | Effective area |
| Answer» C. Captured area | |
| 28. |
What is the overall efficiency of a lossless antenna with reflection coefficient 0.15? |
| A. | 0.997 |
| B. | 0.779 |
| C. | 0.669 |
| D. | 0.977 |
| Answer» E. | |
| 29. |
The ratio of radiation intensity in a given direction from antenna to the radiation intensity over all directions is called as ________ |
| A. | Directivity |
| B. | Radiation power density |
| C. | Gain of antenna |
| D. | Array Factor |
| Answer» B. Radiation power density | |
| 30. |
The induction and radiation fields are equal at a distance of _______ |
| A. | λ/4 |
| B. | λ/6 |
| C. | λ/8 |
| D. | λ/2 |
| Answer» C. λ/8 | |
| 31. |
The relation between vector magnetic potential and current density is given by ______ |
| A. | ∇.A=J |
| B. | ∇×A=H |
| C. | ∇2 A=-μJ |
| D. | ∇2 A=∇×H |
| Answer» D. ∇2 A=∇×H | |
| 32. |
Raw data should be processed only one time. |
| A. | True |
| B. | False |
| Answer» C. | |
| 33. |
Which of the following is characteristic of Processed Data? |
| A. | Data is not ready for analysis |
| B. | All steps should be noted |
| C. | Hard to use for data analysis |
| D. | None of the mentioned |
| Answer» C. Hard to use for data analysis | |
| 34. |
Which of the following is a key characteristic of a hacker? |
| A. | Afraid to say they don’t know the answer |
| B. | Willing to find answers on their own |
| C. | Not Willing to find answers on their own |
| D. | All of the mentioned |
| Answer» C. Not Willing to find answers on their own | |
| 35. |
Which of the following is one of the key data science skills? |
| A. | Statistics |
| B. | Machine Learning |
| C. | Data Visualization |
| D. | All of the mentioned |
| Answer» E. | |
| 36. |
Which of the following approach should be used to ask Data Analysis question? |
| A. | Find only one solution for particular problem |
| B. | Find out the question which is to be answered |
| C. | Find out answer from dataset without asking question |
| D. | None of the mentioned |
| Answer» C. Find out answer from dataset without asking question | |
| 37. |
Which of the following is the most important language for Data Science? |
| A. | Java |
| B. | Ruby |
| C. | R |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 38. |
Which of the following is performed by Data Scientist? |
| A. | Define the question |
| B. | Create reproducible code |
| C. | Challenge results |
| D. | All of the mentioned |
| Answer» E. | |
| 39. |
Which of the following would be more appropriate to be replaced with question mark in the following figure? |
| A. | Data Analysis |
| B. | Data Science |
| C. | Descriptive Analytics |
| D. | None of the mentioned |
| Answer» C. Descriptive Analytics | |
| 40. |
The OS X has ____________ |
| A. | monolithic kernel |
| B. | hybrid kernel |
| C. | microkernel |
| D. | monolithic kernel with modules |
| Answer» C. microkernel | |
| 41. |
If a process fails, most operating system write the error information to a ______ |
| A. | log file |
| B. | another running process |
| C. | new file |
| D. | none of the mentioned |
| Answer» B. another running process | |
| 42. |
To access the services of operating system, the interface is provided by the ___________ |
| A. | System calls |
| B. | API |
| C. | Library |
| D. | Assembly instructions |
| Answer» B. API | |
| 43. |
Which of the following is used as a secondary antenna in the reflector antenna? |
| A. | Horn |
| B. | Feed antenna |
| C. | Parabolic |
| D. | Dipole |
| Answer» D. Dipole | |
| 44. |
When a reflector is placed at the foci along the feed it is called ____ antenna |
| A. | Dual reflector antenna |
| B. | Plane antenna |
| C. | Wire antenna |
| D. | Convex-Convex |
| Answer» B. Plane antenna | |
| 45. |
Which of the following is not a reflector antenna? |
| A. | Convex-convex |
| B. | Corner |
| C. | Gregorian |
| D. | Cassegrain |
| Answer» B. Corner | |
| 46. |
Which of the following is false regarding a reflector antenna? |
| A. | Reflector antennas are high gain antennas with two antennas |
| B. | Both the primary and secondary antennas are excited |
| C. | The pattern of the reflector in the reflector antenna is the Secondary pattern |
| D. | A dual reflector contains two reflectors and one primary feed |
| Answer» C. The pattern of the reflector in the reflector antenna is the Secondary pattern | |
| 47. |
What is the value of magnification of the Cassegrain antenna if its sub-reflector eccentricity is 2? |
| A. | 3 |
| B. | 2 |
| C. | 1/3 |
| D. | 1/2 |
| Answer» B. 2 | |
| 48. |
Which of the following efficiency is used to measure the power-loss at the feed pattern which is intercepted by reflector? |
| A. | Spillover |
| B. | Illumination |
| C. | Taper |
| D. | Aperture |
| Answer» B. Illumination | |
| 49. |
Which of the following combination forms a Cassegrain antenna? |
| A. | The main reflector is parabolic and sub-reflector is hyperbolic |
| B. | The main reflector is parabolic and sub-reflector is concave |
| C. | The main reflector is hyperbolic and sub-reflector is parabolic |
| D. | The main reflector is hyperbolic and sub-reflector is convex |
| Answer» B. The main reflector is parabolic and sub-reflector is concave | |
| 50. |
Which of the following is a dual reflector antenna? |
| A. | Cassegrain antenna |
| B. | Parabolic antenna |
| C. | Offset reflector antenna |
| D. | Wire antenna |
| Answer» B. Parabolic antenna | |