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Experis IT Interview Questions and Answers

Updated 5 Feb 2024
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Q1. What is the minimum clearance for DDR Data group signals Routing?

Ans.

The minimum clearance for DDR Data group signals Routing is 6 mils.

  • DDR Data group signals Routing requires a minimum clearance of 6 mils to avoid crosstalk and interference.

  • The clearance may vary depending on the specific DDR standard being used.

  • It is important to follow the recommended guidelines provided by the DDR manufacturer.

  • Failure to meet the minimum clearance requirements can result in signal integrity issues and data corruption.

  • Examples of DDR standards include DDR2,...read more

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Q2. What is operating frequency of USB Type C?

Ans.

The operating frequency of USB Type C is 10 Gbps.

  • USB Type C has a maximum data transfer rate of 10 Gbps

  • It is also backward compatible with USB 2.0 and 3.0

  • The frequency can vary depending on the device and cable used

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Q3. How can you define micro vias in PCB board?

Ans.

Micro vias are small holes drilled in PCBs to connect different layers of the board.

  • Micro vias are typically less than 0.15mm in diameter.

  • They are used to save space on the board and increase routing density.

  • Micro vias can be drilled using lasers or mechanical drills.

  • They are commonly used in high-density interconnect (HDI) PCBs.

  • Micro vias can be filled with conductive or non-conductive materials.

  • They can be blind vias, which connect an outer layer to an inner layer, or burie...read more

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Q4. What is operating frequency of DDR 4

Ans.

The operating frequency of DDR4 is 2133 MHz to 4266 MHz.

  • DDR4 operates at higher frequencies than its predecessor DDR3

  • The operating frequency of DDR4 depends on the specific module and its configuration

  • DDR4 can operate at frequencies ranging from 2133 MHz to 4266 MHz

  • Higher frequency modules tend to be more expensive

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Q5. What type of PCie connector used in your project

Ans.

We used PCIe Gen3 x16 connector in our project.

  • PCIe Gen3 x16 connector provides high-speed data transfer.

  • It has 16 lanes for data transmission.

  • It is commonly used in high-performance graphics cards and storage devices.

  • It has a maximum bandwidth of 32 GB/s.

  • Examples of devices that use PCIe Gen3 x16 connector are NVIDIA GeForce GTX 1080 Ti and Samsung 970 PRO SSD.

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Q6. What type of signals available in DDR

Ans.

DDR signals include command, address, data, clock, and control signals.

  • DDR stands for Double Data Rate, which means data is transferred twice per clock cycle.

  • Command signals are used to initiate operations like read, write, and refresh.

  • Address signals specify the location of data in memory.

  • Data signals carry the actual data being transferred.

  • Clock signals synchronize the timing of all the signals.

  • Control signals include chip select, data strobe, and write enable signals.

  • DDR4 ...read more

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Q7. What is Open Drain and Open Source

Ans.

Open drain is a type of output circuitry used in digital electronics. Open source refers to software that is freely available to use and modify.

  • Open drain is a type of output circuitry where the output transistor is connected to ground instead of a voltage source.

  • Open drain outputs are commonly used in digital circuits to interface with other devices or circuits.

  • Open source refers to software that is freely available to use, modify, and distribute.

  • Open source software is ofte...read more

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Q8. What is Fine pitch BGA

Ans.

Fine pitch BGA refers to a Ball Grid Array (BGA) package with a small distance between the center of one ball to the center of the next ball.

  • Fine pitch BGA has a pitch of less than 1.0 mm.

  • It is commonly used in high-density applications such as microprocessors, memory chips, and graphics processors.

  • Fine pitch BGA requires precise manufacturing techniques and careful handling during assembly and rework.

  • Examples of fine pitch BGA include Intel's Pentium 4 processor and NVIDIA's...read more

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